Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1972-03-27
1976-12-21
Borchelt, Archie R.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250376, G01D 534
Patent
active
039990630
ABSTRACT:
An optical measuring system is described for automatically operating an electrometer. A binant electrometer is employed with a quartz fiber mounted at one end but free to vibrate at the other in an AC field. The fiber oscillates if a charge is placed upon it. An optical slit replaces the ordinary eyepiece reticule scale. With the quartz fiber adjusted so its image is in focus at the optical slit, photoelectric signals are obtained at null charge on the fiber. The quartz fiber is repeatedly charged and allowed to discharge by collecting ions from a source under measurement. Each photoelectric signal causes a digital time reading to be taken. The time readings are used to evaluate the current due to the collected charge. The photoelectric signals, by feedback, also operate the electrometer for continuous or intermittent-continuous operation. Basically the system is a current digitizer. The method is applied to the measurement of force in other types of fields.
REFERENCES:
patent: 2368093 (1945-01-01), Asset et al.
patent: 2986697 (1961-05-01), Luger
patent: 3384750 (1968-05-01), Owen
Borchelt Archie R.
The Pioneer Educational Society
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